Cap



June 12, 1928. 1,673,485

J. BERGE CAP Filed March 19, 1925 INVENTOR (fa sear; .fiecge Z I' T URNEY Patented June 12, 1928.

JOSEPH BERGE, F MONTCLAIR, NEW JERSEY.

Application filed March 19, 1925. Serial No. 16,647.

ders, cups, case-s, bottles, cisterns, instruments, clocks, etc.

When the device is continuous, I preferably refer to it as a cap. The same device with an opening therein I refer to as a capping ring. The mode of attachment is the same in each case. For convenience of expression I may use the term cap as the generic expression to include both.

The cap, which is of hard and strong material, preferably metal, is provided with a flange to encircle the body of whatever ar-.

ticle, container, casing, cylinder, etc., is to be capped.

This flange is inturned at its margin, the

inturned part making an acuate, through not necessarily sharp angle, with the remaining portion of the flange.

The opening within the inturned margin is slightly smaller than the outer diameter of the body to be capped. The cap having the flange with the inturned margin is forced on to the body to be capped, the inturned marginal part springing or yielding slightly to permit the cap to pass over the body.

The inturned margin has a sharp edge or corner where it contacts with the body. The material of the body if smooth is preferably somewhat softer than the cap material so that the marginal edge or corner can bite into the material of the body or the body may have grooves rolled into it, so that the sharp cap margin edge will engage these grooves.

When the cap is in place it is self-locking, and any force or pressure applied to remove it merely causes tighter and closer engagement of the cap with the body, so that a permanent closure is effected, and to take the cap ofi it must be destroyed. Thus by a very simple and cheap construction I am enabled to permanently close bodies, casings,

etc, and to prevent objects or instruments therein from being tampered with.

The accompanying drawings show embodiments ofthe invention for purposes 0 illustration and aflordin'g an understanding of the invention, but without imposing limitations thereon.

Tn the drawings, Fig. 1 is a part section and part side view of a body with a cap in place thereon. 2, 3 and it are sectional details showing the mode of application of the cap of Fig. 1. Fig. 5 is a detail section of a cap on a serrated body, and Fig. 6 is a. detail section of a capping ring holding a disk on a smooth body.

The preferably cylindrical casing 10 may be smooth on its exterior or may be roughened or serrated, as shown in Fig. 5, by hav ing the serrations or grooves 11 formed therein, preferably by rolling them in. When so serrated the grooves 11 preferably have comparatively sharp downwardly directed corners or edges 12, which serve to prevent a cap engaged therewith from being pulled 0E.

The cap of Figs. 1 1 designated generally by reference numeral 13 comprises the closure part 14, the flange 15, and the flan e margin inturned portion 16, having the sharp edge 17.

The angle 18 between inturned part 16 and flange part 15 is decreased somewhat as indicated (exaggerated) at 18', Fig. 4, when the cap is applied and forced down over the body from the position shown in Fig. 3 to that of Fig. 4. If force is applied with the intention of removing the cap, the fact that the inturned margin 16 is reversely turned with respect to the flange portion 15 causes the former to dig in or look. Thus the cap or its flange must be destroyed in order to permit removal.

The capping ring 19 of Fig. 6 has a central opening 20. When using such capping rings rated body, a disk 21 of metal, glass, paper or any other material may be inserted between the body and the capping ring and held in place by the latter and same cannot be removed without practically destroying the capping ring. When used in connection with clocks, gauges, instruments and the like, the member 21 consisting of the face or dial of such clock, gauge or instrument is held in place by the capping ring 19.

It will be seen that the invention aflords a verv simple and cheap construction, especially well adapted for sheet metal structures in which it is desired to permanently 1 cap an open ended body with a cap to remain permanently in place, and which will resist removal until it is itself destroyed.

I claim:

it cap for a body provided with external threads or serrations adjacent the end to be capped, said cap having a flange with a re with either a smooth walled or a ser- I versely inturned preformed margin termiwith a grip which is increased by applicanating in a sharp edge, the opening within tion of force in a direction to retract the 10 the inturned margin being of diameter cap, and the cap resists removal until it is slightly smaller than the outside diameter of itself destroyed.

the bod end to be capped, so that the sharp In testimony whereof, I have signed my edge 0 the cap margin, on being forced name hereto.

over thebody, engages the furthermost of the threads or serrations and grips same JOSEPH EERGE. 

